[GTK] GTK2 paint code path does not render AC layers

https://bugs.webkit.org/show_bug.cgi?id=124967

Patch by Gustavo Noronha Silva <gustavo.noronha@collabora.com> on 2013-12-02
Reviewed by Carlos Garcia Campos.

* webkit/webkitwebview.cpp:
(webkit_web_view_expose_event): also paint AC layers when painting the widget,
when AC is on.

Canonical link: https://commits.webkit.org/143170@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@159926 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebKit/gtk/ChangeLog

@@ -1,3 +1,14 @@
+2013-12-02  Gustavo Noronha Silva  <gustavo.noronha@collabora.com>
+
+        [GTK] GTK2 paint code path does not render AC layers
+        https://bugs.webkit.org/show_bug.cgi?id=124967
+
+        Reviewed by Carlos Garcia Campos.
+
+        * webkit/webkitwebview.cpp:
+        (webkit_web_view_expose_event): also paint AC layers when painting the widget,
+        when AC is on.
+
 2013-11-28  Gustavo Noronha Silva  <gustavo.noronha@collabora.com>
 
         REGRESSION(r154658): webkit_web_view_get_view_source_mode always returns false

Source/WebKit/gtk/webkit/webkitwebview.cpp

@@ -671,6 +671,17 @@ static gboolean webkit_web_view_expose_event(GtkWidget* widget, GdkEventExpose*
     gdk_region_get_rectangles(event->region, &rects.outPtr(), &rectCount);
 
     RefPtr<cairo_t> cr = adoptRef(gdk_cairo_create(event->window));
+
+    WebKitWebViewPrivate* priv = WEBKIT_WEB_VIEW(widget)->priv;
+#if USE(TEXTURE_MAPPER)
+    GdkRectangle clipRect;
+    gdk_region_get_clipbox(event->region, &clipRect);
+    if (priv->acceleratedCompositingContext->renderLayersToWindow(cr.get(), clipRect)) {
+        GTK_WIDGET_CLASS(webkit_web_view_parent_class)->expose_event(widget, event);
+        return FALSE;
+    }
+#endif
+
     for (int i = 0; i < rectCount; i++) {
         copyRectFromCairoSurfaceToContext(WEBKIT_WEB_VIEW(widget)->priv->backingStore->cairoSurface(),
                                           cr.get(), IntSize(), IntRect(rects.get()[i]));